YouTube is the world's second most-visited website.
On the YouTube mobile app, users saw the "Error loading / Tap to retry" error message when they attempted to play videos.
YouTube said it was trying to resolve the issue.
Say goodbye to all your favourite let's players, game walkthroughs and new game trailers, YouTube is down!
YouTube is aware of the issue, though no ETA has been given on when we can expect a fix. More information will be provided as it becomes available.
Terence Crawford throws ridiculous punch at weigh
Crawford now holds a ideal 33-0 record with 24 KOs heading into Saturday's fight, where he'll defend his WBO welterweight title. This was a fight Crawford personally asked for and he is ready to humble the undefeated Arizona based boxer.
"Still down in Raleigh, the site loads but nothing is displayed".
These appear with a line of code and a purple monkey holding a hammer, with the message: "Sorry something went wrong", a message from YouTube reads.
When users tried to access YouTube videos - including on RNZ.co.nz - they encountered error messages.